RU2811611C1 - Stabilizer for loads transported by cranes - Google Patents

Abstract

FIELD: lifting equipment.

SUBSTANCE: invention relates to structural elements of lifting vehicles, in particular to devices for limiting or preventing the swinging of loads in the longitudinal or transverse directions. The stabilizer of cargo transported by cranes contains a container secured to the crane slings, in which blades are placed on a fixed axis, which, when the cargo is rotated, are placed in the cavity of the container and perform a rotational movement, and when the cargo is lifted, they are removed inside the axis structure; bulk material is placed inside the container or liquid.

EFFECT: increase in the efficiency of stabilization of cargo transported by cranes.

8 cl, 4 dwg

Description

TECHNICAL FIELD

The invention relates to structural elements of lifting vehicles, in particular to devices for limiting or preventing the swinging of loads in the longitudinal or transverse directions.

BACKGROUND ART

Devices are known from the prior art to prevent the swinging of loads in the longitudinal or transverse directions, for example a lifting cable for a load (see DE1907598A1, publ. 08/27/1970) (1) the pendulum movement of which must be suppressed in at least one pendulum plane, with two lifting cables located in this pendulum plane, which can be synchronized with each other and inclined towards each other and together form a cable. The guide point of one hoisting rope is connected in opposite directions to the guide point of the other hoisting rope for opposing cable deflection of the two hoisting cables such that at these guide points the possibility of pendulum deflection at the level of the cable occurs and the opposite movement of the guide points can be damped and/or blocked.

Device (1) is not reliable, since compensation for load deflection occurs only in two directions.

It is also known in the prior art to have a compact overhead lifting device with a function of preventing load swinging such as side swinging or turning when lifting the lift body up and down using a plurality of wire ropes (see JP2001199685A, 07/24/2001)(2). This lifting device has a winding drum with a vertical shaft driven by a rotary drive device mounted on a support member. The winding drum is wound with a number of steel cables, each of which is wound several turns in a line. The lifting body (grab bucket) is suspended on a plurality of wire ropes driven by the winding drum, and can be driven by the opening/closing of the winding drum located adjacent to the winding drum by means of a cable.

Device (2) is also unreliable; all such designs do not provide compensation for vibrations in any direction.

The closest analogue of the claimed invention, in the opinion of the applicant, is a device for stabilizing the position of a load-lifting device, which contains at least one rotating gyroscope mounted on a load-lifting device under the suspension device (see DE10137071A1, published on February 20, 2003) (3) The device contains at least one rotating a gyroscope mounted on a lifting device under the suspension device. The rotation of the gyroscopes preferably occurs around a vertical axis, and their directions of rotation are opposite. The axis of rotation is a continuation of the axis of the supporting cable.

The option proposed in the closest analogue (3) is widely used in practice, but this device is very heavy and energy-consuming.

SUMMARY OF THE INVENTION

This invention is aimed at solving a technical problem associated with the creation of a safe, effective and cheap stabilizer for loads transported by cranes

The technical result of the invention is to increase the efficiency of stabilization of cargo transported by cranes.

Achieving the stated technical result is possible by means of a load stabilizer transported by cranes, containing a container secured to the crane slings, in which blades are placed on a fixed axis, which, when the load is rotated, are placed in the cavity of the container and perform a rotational movement, and when the load is lifted, they are retracted inside the axis structure , a bulk material or liquid is placed inside the container.

In a particular embodiment, a conical recess is made in the container.

In a particular embodiment, crushed stone, quartz sand, and shot can be used as bulk material.

In a particular embodiment, a liquid with high density is used.

In a particular embodiment, the blades are made as screws and in the inactive position are placed in a folded form inside the central axis.

In a particular embodiment, the axle is bolted to the bottom of the container.

In a particular embodiment, the blades switch to an active state after a signal from the angular position sensor of the crane slings.

In a particular embodiment, the height of the container is less than its length.

BRIEF DESCRIPTION OF DRAWINGS

The essence of the invention is illustrated by drawings, in which;

Fig. 1 – diagram of the placement of the stabilizer on the crane;

Figure 2 – top view of the stabilizer;

Fig.3 – side view of the stabilizer;

Figure 4 – kinematic diagram of the stabilizer.

OPTION FOR IMPLEMENTATION OF THE INVENTION

According to the exemplary embodiment of the invention shown in FIG. stabilizer of cargo transported by cranes, which is a container (1) attached to the crane slings (2). Advantageously, a conical recess is made in the container (1). An axle (3) is located in the center of the container; the axle can be bolted to the bottom of the container (1). The blades (4) are located in the container in such a way that when the load is rotated, they are placed in the container cavity and perform a rotational movement, and when the load is lifted, they are retracted inside the axis (3). When the load is rotated, the blades are fixed on the axis and rotate around it using a built-in drive. In this case, bulk material or liquid is placed inside the container (1). Thus, pendulum vibrations are damped using a passive vibration damper with bulk material, and torsional vibrations are damped using the principle of reactive moments by mixing the bulk material.

Crushed stone, quartz sand, and shot can be used as bulk material.

A liquid with a high density can also be used.

The blades (4) are made predominantly helical and in the inactive position are placed in a folded form inside the central axis.

The built-in drive operates primarily from the angular position sensor of the crane slings (3), causing the blades (4) to rotate.

A flat container is preferably used, in which the height of the container is less than its length.

Claims (8)

1. A stabilizer for cargo transported by cranes, containing a container secured to the crane slings, in which blades are placed on a fixed axis, which, when the cargo is rotated, are placed in the container cavity and perform a rotational movement, and when the cargo is lifted, they are retracted inside the axis structure, placed inside the container bulk material or liquid. 2. Cargo stabilizer according to claim 1, characterized in that the container has a conical recess. 3. Cargo stabilizer according to claim 1, characterized in that crushed stone, quartz sand, and shot can be used as bulk material. 4. Cargo stabilizer according to claim 1, characterized in that a liquid with high density is used. 5. The load stabilizer according to claim 1, characterized in that the blades are made of screws and in the inactive position are placed in a folded form inside the central axis. 6. Cargo stabilizer according to claim 1, characterized in that the axle is bolted to the bottom of the container. 7. The load stabilizer according to claim 1, characterized in that the blades go into an active state after a signal from the angular position sensor of the crane slings. 8. Cargo stabilizer according to claim 1, characterized in that the height of the container is less than its length.